I got a pair of New Balance MT100's for my birthday. These things are light! Nearly half the weight of all my other size 12 trail shoes. On my scale a size12 weighs 8.3 oz, while a size 12 Vasque Blur weighs 14.6 oz and a size 12.5 Montrail Hardrock weighs 18.4 oz. This lightness comes at a cost. They certainly aren't as beefy or cushioned as most other trail running shoes, so you wouldn't want to enter a rock kicking contest wearing these. I recieved a size 12 , which is what I usually wear and I would say that they fit true to size. I've only been on a couple of shorter runs in them so I can't say how they'd feel on a longer run (plan to try soon), but if I were doing a shorter trail race I'd probably grab these first.
